We have 2 Cisco 1921 routers setup with a fiber PTP between them with all of the internet coming through at 1 location. At the second location I installed a EHWIC model EHWIC-1GE-SFP-CU to connect to a cradlepoint cell modem that we can use as a backup in case the fiber goes down. From the router with the backup connection i turned on the backup interface and it switches fine between the primary and secondary link. From the router when I am connected to the backup it will ping outside with no problem, however if I try to do ping anything from an inside computer. Below is part of the running config plus the ip route - the ip route shows the primary link up. When the secondary comes up, the static route kicks in and shows up in ip route. I didn't want to mess with SLA as i have to purchase another license, and I already bought the EHWIC so i am hopeing I can get this working.
interface GigabitEthernet0/0
description Time Warner P2P
backup interface GigabitEthernet0/0/0
ip address 172.16.0.2 255.255.255.252
duplex auto
speed auto
service-policy output QoS_Policy
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/1.1
description LAN 192.168.2.0/24
encapsulation dot1Q 1 native
ip address 192.168.2.241 255.255.255.0 secondary
ip address 192.168.2.254 255.255.255.0
!
interface GigabitEthernet0/1.30
description VoIP 192.168.32.0/24
encapsulation dot1Q 30
ip address 192.168.32.254 255.255.255.0
ip helper-address 192.168.2.4
!
interface GigabitEthernet0/1.100
description Public Wifi 192.168.102.0/24
encapsulation dot1Q 100
ip address 192.168.102.254 255.255.255.0
ip access-group Wireless_Out_ACL in
ip access-group Wireless_In_ACL out
rate-limit input 1496000 512000 1000000 conform-action continue exceed-action drop
rate-limit output 1496000 512000 1000000 conform-action continue exceed-action drop
!
interface GigabitEthernet0/1.110
description Camera 192.168.112.0/24
encapsulation dot1Q 110
ip address 192.168.112.254 255.255.255.0
!
interface GigabitEthernet0/0/0
ip address 10.10.10.1 255.255.255.0
duplex auto
speed auto
!
router ospf 100
network 10.10.10.0 0.0.0.255 area 0
network 172.16.0.0 0.0.0.3 area 0
network 192.168.2.0 0.0.0.255 area 0
network 192.168.32.0 0.0.0.255 area 0
network 192.168.112.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
ip route 0.0.0.0 0.0.0.0 10.10.10.2
!
O*E2 0.0.0.0/0 [110/1] via 172.16.0.1, 1d01h, GigabitEthernet0/0
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/30 is directly connected, GigabitEthernet0/0
L 172.16.0.2/32 is directly connected, GigabitEthernet0/0
O 192.168.1.0/24 [110/2] via 172.16.0.1, 1d01h, GigabitEthernet0/0
192.168.2.0/24 is variably subnetted, 3 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/1.1
L 192.168.2.241/32 is directly connected, GigabitEthernet0/1.1
L 192.168.2.254/32 is directly connected, GigabitEthernet0/1.1
O 192.168.31.0/24 [110/2] via 172.16.0.1, 1d01h, GigabitEthernet0/0
192.168.32.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.32.0/24 is directly connected, GigabitEthernet0/1.30
L 192.168.32.254/32 is directly connected, GigabitEthernet0/1.30
192.168.102.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.102.0/24 is directly connected, GigabitEthernet0/1.100
L 192.168.102.254/32 is directly connected, GigabitEthernet0/1.100
O 192.168.111.0/24 [110/2] via 172.16.0.1, 1d01h, GigabitEthernet0/0
192.168.112.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.112.0/24 is directly connected, GigabitEthernet0/1.110
L 192.168.112.254/32 is directly connected, GigabitEthernet0/1.110
